WO2019022454A1 - Electrochemical gas sensor having planar exterior - Google Patents

Electrochemical gas sensor having planar exterior Download PDF

Info

Publication number
WO2019022454A1
WO2019022454A1 PCT/KR2018/008276 KR2018008276W WO2019022454A1 WO 2019022454 A1 WO2019022454 A1 WO 2019022454A1 KR 2018008276 W KR2018008276 W KR 2018008276W WO 2019022454 A1 WO2019022454 A1 WO 2019022454A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
case
gas sensor
metal electrode
electrochemical gas
Prior art date
Application number
PCT/KR2018/008276
Other languages
French (fr)
Korean (ko)
Inventor
한상도
이동윤
이기원
Original Assignee
(주)신우전자
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)신우전자 filed Critical (주)신우전자
Publication of WO2019022454A1 publication Critical patent/WO2019022454A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/403—Cells and electrode assemblies
    • G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4162—Systems investigating the composition of gases, by the influence exerted on ionic conductivity in a liquid

Definitions

  • the present invention relates to a structure of a metal electrode that electrically connects a gas sensor to the outside, and more particularly to an electrochemical gas sensor having a specific metal electrode structure.
  • a gas sensor for detecting a gas present in the atmosphere includes a semiconductor gas sensor in which a catalyst is added to a metal oxide semiconductor material such as tin oxide, a solid electrolyte gas sensor in which zirconia is the main material, An optical gas sensor that detects the wavelength of the ultraviolet light emission, and an electrochemical gas sensor that measures the current intensity generated by the electrode reaction in the redox reaction in the electrolyte of the gas.
  • the electrochemical gas sensor is capable of detecting a large number of gases such as combustible gas, toxic gas and environmental gas, and has a characteristic of being able to measure even a low concentration of several ppm (ppm). Therefore, Research is also actively proceeding.
  • the electrochemical gas sensor includes three electrodes and an electrolyte, which are divided into a working electrode, a counter electrode, and a reference electrode.
  • the electrolytic gas sensor includes an electrolytic solution having a constant potential between a working electrode and a reference electrode, And the magnitude of the electrolytic current generated between the working electrode and the counter electrode is detected to detect the presence or absence of the gas and its concentration. At this time, it is possible to quantitatively detect the specific gas by advancing the oxidation and reduction reaction selectively by changing the specific potential according to the type of gas to be detected.
  • a metal electrode for electrically connecting the three electrodes included in the electrochemical gas sensor to the outside is connected to each electrode.
  • the metal electrode is fixed to the case of the electrochemical gas sensor.
  • One end of the metal electrode is inserted into the case and contacts one of the working electrode, the counter electrode and the reference electrode.
  • the other end is connected to an external electric circuit from outside the case.
  • the structure of the metal electrode that enables the metal electrode to be stably fixed to the case of the electrochemical gas sensor and to make contact with the electrode is important in the design.
  • Japanese Patent No. 4204292 discloses a structure in which a first bend portion And then a second bent portion bent again in the horizontal direction.
  • the metal electrode is bent twice inside the case, it is difficult to install the metal electrode after first fabricating the case, so that it is difficult to process the case in which the metal electrode is injected in the injection process of the case Furthermore, since the metal electrode is bent in the upward direction, the height of the electrochemical gas sensor is increased, which is not suitable for miniaturization of the sensor.
  • an electrochemical gas sensor having a flat plate-like external shape and having a low height and including a hollow accommodation space therein, the case being configured to allow a detection target gas to flow into the accommodation space;
  • An electrolyte disposed in the accommodation space;
  • a counter electrode and a reference electrode provided in the accommodation space and capable of detecting a change in current generated in contact with the electrolyte to perform electrolysis and a concentration of the detection target gas dissolved in the electrolyte,
  • An electrode part made of a flexible material;
  • three metal electrodes electrically connecting each of the electrodes of the electrode unit to the outside, wherein the metal electrode includes a fixing unit having an end located inside the case and bent at 90 degrees on a two-dimensional plane parallel to the bottom .
  • the present invention is characterized by a structure of a metal electrode for electrically connecting a working electrode to a counter electrode and a reference electrode in an electrochemical gas sensor. More specifically, the present invention provides a two-dimensional A 90 ° bent structure is applied to the left or right side of the plane. With this structure, it is possible to easily assemble the case and the metal electrode, to maintain a mechanically stable structure, to increase the contact area with the electrode, and to reduce the height of the electrochemical gas sensor, There are advantages.
  • a supporting structure corresponding to the shape of the fixing portion is formed in the case, and the metal electrode is stably fixed by being inserted and positioned in the supporting structure.
  • the case is preferably formed of a lower case having a receiving space and an upper case covering the receiving space, and the supporting structure is formed in the lower case and the metal electrode is installed in the lower case. It is preferable that the supporting structure has a structure having a height and shape such that the upper surface of the metal electrode can be exposed to the electrode of the electrode part.
  • the metal electrode has a structure in which the middle portion thereof is bent at an angle of 90 deg. So that the end portion exposed to the outside of the case, that is, the side opposite to the fixed portion faces downward. The end of the metal electrode is directed downward and is directly connected to an external terminal, so that the electrochemical gas sensor can be installed in a state in which it is kept horizontal.
  • the surface of the metal electrode contacting the case is subjected to a knurling treatment so that the metal electrode is more stably fixed.
  • the material of the metal electrode is not limited as long as it is an electrically connectable material, but it is preferably made of a material containing one of tantalum (Ta), titanium (Ti) and nickel (Ni).
  • the present invention constructed as described above has a structure in which the fixing portion for fixing the metal electrode in the case is formed by being bent at 90 degrees to the left or right on a two-dimensional plane parallel to the floor, It is possible to manufacture and assemble the case easily.
  • a support structure corresponding to the fixed portion of the metal electrode is formed in the case, thereby stably maintaining the fixed state.
  • the area of contact with the electrode of the electrode portion is increased through the structure bent on the two-dimensional plane, and the height of the electrochemical gas sensor is reduced, thereby producing a micro electrochemical gas sensor of a flat plate-like outer shape.
  • the electrochemical gas sensor to which the structure of the present invention is applied has the effect of reducing the electric power used and increasing the service life.
  • FIG. 1 is an exploded perspective view illustrating a structure of a metal electrode of an electrochemical gas sensor according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view illustrating a structure of an electrochemical gas sensor according to an embodiment of the present invention.
  • FIG 3 is an exploded perspective view illustrating an electrode unit used in an electrochemical gas sensor according to an embodiment of the present invention.
  • the electrochemical gas sensor of the present invention comprises a case, an electrolyte disposed in the accommodation space inside the case, and an electrode unit provided in the accommodation space.
  • the case is a body constituting the electrochemical gas sensor.
  • a housing space is formed in the housing, and a ventilation hole is formed so that air containing the gas to be detected can be introduced into the housing space.
  • a filter is provided in the ventilation hole to block the inflow of moisture or dust from the outside, and the configuration of the ventilation hole for the inflow of gas and the filter can be applied without limitation to the general gas sensor technology without impairing the characteristics of the present invention , And a detailed description thereof will be omitted.
  • the electrolyte is electrolyzed by the current applied between the working electrode and the reference electrode while the detection target gas introduced through the vent of the case dissolves and the current between the working electrode and the counter electrode changes, Since it has the same function as the electrolyte of the sensor, its detailed description is omitted.
  • the electrode unit includes a working electrode, a reference electrode for electrolyzing the working electrode and the electrolyte, and a counter electrode for measuring an electrolytic current generated between the working electrode and the working electrode.
  • the electrode unit of the conventional electrochemical gas sensor can be applied to all of them, and thus a detailed description thereof will be omitted.
  • the metal electrode has a structure for electrically connecting the electrodes included in the electrode portion to the outside.
  • the metal electrode is in contact with the electrodes of the electrode portion inside the case at one end and exposed to the outside of the case at the other end, Lt; / RTI >
  • the material of the metal electrode may be any material used in conventional electrochemical gas sensors such as tantalum (Ta), titanium (Ti), and nickel (Ni).
  • the present invention includes the general construction of the electrochemical gas sensor described above, but differs from the conventional technology in the specific structure of the metal electrode.
  • FIG. 1 is an exploded perspective view showing a structure of a metal electrode of an electrochemical gas sensor according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view illustrating the structure of an electrochemical gas sensor according to an embodiment of the present invention
  • FIG. 3 is an exploded perspective view showing the structure of an electrode part used in an electrochemical gas sensor according to an embodiment of the present invention.
  • three metal electrodes 210, 220 and 230 are installed in a case 100.
  • a housing space 300 is formed in the case 100, and an electrolyte 400 is disposed in the housing space 300.
  • the case 100 may be divided into an upper case and a lower case.
  • metal electrodes are provided in the lower case, but the present invention is not limited thereto.
  • Each of the three metal electrodes 210, 220 and 230 provided on the lower case is in contact with one of the working electrode 514, the counter electrode 524 and the reference electrode 526 included in the electrode unit 500.
  • the electrode unit 500 is located on the upper side of the metal electrodes 210, 220 and 230 so that the three electrodes formed on the electrode unit 500 contact the upper surfaces of the metal electrodes 210, 220 and 230, respectively.
  • the electrochemical gas sensor of the present invention comprises a case, an electrolyte disposed in the accommodation space inside the case, and an electrode unit provided in the accommodation space.
  • the case is a body constituting the electrochemical gas sensor.
  • a housing space is formed in the housing, and a ventilation hole is formed so that air containing the gas to be detected can be introduced into the housing space.
  • a filter is provided in the ventilation hole to block the inflow of moisture or dust from the outside, and the configuration of the ventilation hole for the inflow of gas and the filter can be applied without limitation to the general gas sensor technology without impairing the characteristics of the present invention , And a detailed description thereof will be omitted.
  • the electrolyte is electrolyzed by the current applied between the working electrode and the reference electrode while the detection target gas introduced through the vent of the case dissolves and the current between the working electrode and the counter electrode changes, Since it has the same function as the electrolyte of the sensor, its detailed description is omitted.
  • the electrode unit includes a working electrode, a reference electrode for electrolyzing the working electrode and the electrolyte, and a counter electrode for measuring an electrolytic current generated between the working electrode and the working electrode.
  • the electrode unit of the conventional electrochemical gas sensor can be applied to all of them, and thus a detailed description thereof will be omitted.
  • the metal electrode has a structure for electrically connecting the electrodes included in the electrode portion to the outside.
  • the metal electrode is in contact with the electrodes of the electrode portion inside the case at one end and exposed to the outside of the case at the other end, Lt; / RTI >
  • the material of the metal electrode may be any material used in conventional electrochemical gas sensors such as tantalum (Ta), titanium (Ti), and nickel (Ni).
  • the present invention includes the general construction of the electrochemical gas sensor described above, but differs from the conventional technology in the specific structure of the metal electrode.
  • FIG. 1 is an exploded perspective view showing a structure of a metal electrode of an electrochemical gas sensor according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view illustrating the structure of an electrochemical gas sensor according to an embodiment of the present invention
  • FIG. 3 is an exploded perspective view showing the structure of an electrode part used in an electrochemical gas sensor according to an embodiment of the present invention.
  • three metal electrodes 210, 220 and 230 are installed in a case 100.
  • a housing space 300 is formed in the case 100, and an electrolyte 400 is disposed in the housing space 300.
  • the case 100 may be divided into an upper case and a lower case.
  • metal electrodes are provided in the lower case, but the present invention is not limited thereto.
  • Each of the three metal electrodes 210, 220 and 230 provided on the lower case is in contact with one of the working electrode 514, the counter electrode 524 and the reference electrode 526 included in the electrode unit 500.
  • the electrode unit 500 is located on the upper side of the metal electrodes 210, 220 and 230 so that the three electrodes formed on the electrode unit 500 contact the upper surfaces of the metal electrodes 210, 220 and 230, respectively. do.
  • the three metal electrodes 210, 220 and 230 which are in contact with the working electrode 514 and the counter electrode 524 and the reference electrode 526 are the same in structure. Will be described.
  • the metal electrode 210 of the present embodiment includes a body 212, a fixing portion 214 at both ends, and an external connection portion 215.
  • the body 212 has a straight line structure that is located between the outside and the inside of the case 100.
  • the fixing part 214 is a part connected to the end of the body 212 inside the case 100 and has a structure bent to the left or right on a two-dimensional plane.
  • a supporting structure 110 is formed in the case 100 in a shape corresponding to the bent shape of the fixing portion 214.
  • the fixing portion 214 is inserted into the supporting structure 110 to be positioned on the metal electrode 210, The metal electrode 210 can be prevented from moving inside the case 100.
  • the body 212 connected to the fixing portion 214 and the fixing portion 214 must be exposed to the supporting structure 110 without being completely covered with the electrode,
  • the height should also be such that the electrode can contact.
  • the support structure may be formed of an isolation wall 150, which is a wall for isolating the electrolyte from the back of the support structure, so that the electrolyte in the accommodation space is prevented from passing over the space where the metal electrode is installed .
  • the waste of space is reduced as compared with the case where the isolation wall is formed separately from the supporting structure and the space for accommodating space can be secured when fabricating the micro electro chemical gas sensor.
  • the metal electrode 210 of the present embodiment has the structure including the fixing portion 214 in which the end portion of the case side is bent horizontally, the electrode portion 500
  • the area of contact with the reference electrode 526 of the electrode assembly 526 is relatively larger. Further, even when the position of the portion formed for making contact with the metal electrode 210 at the reference electrode 526 of the electrode unit 500 is slightly deviated, the contact state can be maintained. This increase in contact area reduces the number of failures and increases the lifetime of the sensor.
  • the case 100 and the metal electrode 210 are separately manufactured and then the metal electrode 210 is attached to the case 100 in the assembling process, unlike the case where the metal electrode is formed by bending the case upward twice inside the case Can be installed.
  • This is advantageous in that the manufacturing process is much simpler than the injection molding in which the metal electrode is positioned in the case manufacturing process.
  • the upper space of the metal electrode is not used in addition to the case where the electrode is bent upward twice inside the case, a low-height electrolytic chemical gas sensor can be manufactured, and finally, There is an advantage to be able to do.
  • the external connection portion 215 is a portion that extends from the outside of the case 100 to the end of the body 212 and is bent downward by 90 degrees. Since the electrochemical gas sensor is installed in an external circuit or the like in a state in which the electrochemical gas sensor is maintained in a horizontal position, terminals for electrical connection are mostly formed on the bottom. Conventionally, . However, since the metal electrode 210 of the present embodiment is formed by forming the external connection portion 215 by bending the end portion exposed to the outside of the case 100 downward by 90 degrees, the metal electrode 210 can be connected to the terminal formed on the bottom by itself have.
  • the metal electrode 210 of the present embodiment performs a knurling process on a surface of a portion of the body 212 located outside and inside the case 100 in contact with the case 100 to form a nulling portion 216 ).
  • the nulling portion 216 is engaged with the upper case and the lower case to prevent the metal electrode 210 from moving when the sensor is finally assembled. At this time, the knurling portion 216 is formed only at a portion where the knurling portion 216 makes contact with the case 100, and is formed so as not to be seen from outside after assembling.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Measuring Oxygen Concentration In Cells (AREA)

Abstract

The present invention relates to an electrochemical gas sensor having a metal electrode structure which is stably fixed to a case and easily assembled, the electrochemical gas sensor being characterized by comprising three metal electrodes respectively electrically connecting a working electrode, a counter electrode, and a reference electrode of the gas sensor to the outside, wherein an end part of the metal electrode, which is positioned inside the case, includes a fixing part that is bent at 90° on a two-dimensional plane parallel to the bottom. The present invention has the effects in which: a fixing part for fixing the metal electrode inside the case is configured to have a structure in which the fixing part is bent 90° to the left or right on the two-dimensional plane parallel to the bottom, and thus a fixed state can be stably maintained and the case is easier to manufacture and assemble than a conventional structure in which coupling is achieved by bending twice in an upward direction; and the electrochemical gas sensor can ultimately be configured as a low-power consumption long-service life subminiature electrochemical gas sensor having a planar exterior with a low height.

Description

평판형 외형의 전기화학식 가스 센서Plate-shaped external electrochemical gas sensor
본 발명은 가스 센서를 외부와 전기적으로 연결하는 금속전극의 구조에 관한 것으로, 더욱 자세하게는 특유의 금속전극 구조를 가지는 전기화학식 가스 센서에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a metal electrode that electrically connects a gas sensor to the outside, and more particularly to an electrochemical gas sensor having a specific metal electrode structure.
일반적으로 대기 중에 존재하는 가스를 검출하는 가스 센서는 주석산화물 등의 금속산화물 반도체 모재료에 촉매를 첨가한 반도체식 가스센서, 산화지르코니아를 주원료로 하는 고체전해질식 가스센서, 적외선의 흡수파장의 세기나 자외선의 발광특성 파장을 보는 광학식 가스센서, 가스의 전해질속에서 산화환원의 전극반응으로 발생하는 전류세기를 측정하는 전기화학식 가스센서 등으로 구분한다.Generally, a gas sensor for detecting a gas present in the atmosphere includes a semiconductor gas sensor in which a catalyst is added to a metal oxide semiconductor material such as tin oxide, a solid electrolyte gas sensor in which zirconia is the main material, An optical gas sensor that detects the wavelength of the ultraviolet light emission, and an electrochemical gas sensor that measures the current intensity generated by the electrode reaction in the redox reaction in the electrolyte of the gas.
이 중에서 전기화학식 가스 센서는 가연성 가스와 독성가스 및 환경가스 등과 같은 대다수의 가스의 검출이 가능하며, 수 피피엠(ppm)의 저농도까지도 측정이 가능한 특징이 있기 때문에, 최근 사용량이 증가하고 있으며 그에 대한 연구도 활발하게 진행되고 있다.Among these, the electrochemical gas sensor is capable of detecting a large number of gases such as combustible gas, toxic gas and environmental gas, and has a characteristic of being able to measure even a low concentration of several ppm (ppm). Therefore, Research is also actively proceeding.
전기화학식 가스 센서는 작용전극(working electrode)과 상대전극(count electrode) 및 기준전극(reference electrode)으로 구분되는 3개의 전극과 전해질을 포함하며, 작용전극과 기준전극 사이에 일정한 전위로 유지하면서 전해질에 대한 전해를 수행하고, 이때 작용전극과 상대전극 사이에 발생하는 전해전류 크기를 검출하여 가스유무와 그 농도를 검출한다. 이때, 검출하고자하는 가스종류에 따라 특정한 전위를 바꿈으로써 산화, 환원반응을 선택적으로 진행시켜 특정가스를 정량적으로 검지할 수 있다.The electrochemical gas sensor includes three electrodes and an electrolyte, which are divided into a working electrode, a counter electrode, and a reference electrode. The electrolytic gas sensor includes an electrolytic solution having a constant potential between a working electrode and a reference electrode, And the magnitude of the electrolytic current generated between the working electrode and the counter electrode is detected to detect the presence or absence of the gas and its concentration. At this time, it is possible to quantitatively detect the specific gas by advancing the oxidation and reduction reaction selectively by changing the specific potential according to the type of gas to be detected.
이러한 전기화학식 가스 센서에 포함된 3개의 전극을 외부와 전기적으로 연결하기 위한 금속전극이 각각의 전극에 연결된다. 금속전극은 전기화학식 가스 센서의 케이스에 고정되며, 일단은 케이스 내부로 삽입되어 작용전극이나 상대전극 및 기준전극 중에 하나와 접촉하며, 타단은 케이스 외부에서 외부의 전기회로에 연결된다. 금속전극이 전기화학식 가스 센서의 케이스에 안정적으로 고정되어 전극에 접촉할 수 있도록 하는 금속전극의 구조가 설계에서 중요하며, 일본등록특허 제4204292호는 케이스 내부에서 위쪽으로 굽어지는 제1 굽힘부와 이후에 다시 수평방향으로 굽어지는 제2 굽힘부를 포함하는 금속전극의 구조를 제시하였다.A metal electrode for electrically connecting the three electrodes included in the electrochemical gas sensor to the outside is connected to each electrode. The metal electrode is fixed to the case of the electrochemical gas sensor. One end of the metal electrode is inserted into the case and contacts one of the working electrode, the counter electrode and the reference electrode. The other end is connected to an external electric circuit from outside the case. The structure of the metal electrode that enables the metal electrode to be stably fixed to the case of the electrochemical gas sensor and to make contact with the electrode is important in the design. Japanese Patent No. 4204292 discloses a structure in which a first bend portion And then a second bent portion bent again in the horizontal direction.
하지만, 금속전극이 케이스 내부에서 2회 굽어지는 구조로 인하여, 케이스를 먼저 제작한 뒤에 금속전극을 설치하기가 어려워져 케이스의 사출과정에서 금속전극을 삽입한 상태로 사출하여야 하는 공정상의 어려움이 있고, 나아가 금속전극이 위쪽방향으로 굽어지기 때문에 전기화학식 가스 센서의 높이가 높아져서 센서의 소형화에 적합하지 못한 단점이 있다.However, due to the structure in which the metal electrode is bent twice inside the case, it is difficult to install the metal electrode after first fabricating the case, so that it is difficult to process the case in which the metal electrode is injected in the injection process of the case Furthermore, since the metal electrode is bent in the upward direction, the height of the electrochemical gas sensor is increased, which is not suitable for miniaturization of the sensor.
[선행기술문헌] 일본등록특허 제4204292호[Prior Art Document] Japanese Patent No. 4204292
본 발명은 전술한 종래 기술의 문제점을 해결하기 위한 것으로서 전기화학식 가스 센서의 케이스에 안정적으로 고정되면서도 조립이 쉬운 금속전극 구조를 가진 전기화학식 가스 센서를 제공하는데 그 목적이 있다.It is an object of the present invention to provide an electrochemical gas sensor having a metal electrode structure which is stably fixed in a case of an electrochemical gas sensor and easy to assemble.
[이 발명을 지원한 국가연구개발사업][National R & D Project Supporting the Invention]
-과제고유번호: 10069215- Assignment number: 10069215
-부처명: 산업통상자원부- Name of department: Ministry of Commerce, Industry and Energy
-연구관리 전문기관: 한국산업기술관리평가원- Research Management Institution: Korea Industrial Technology Management Evaluation Institute
-연구사업명: 산업핵심기술개발사업- Research Project Name: Industrial Core Technology Development Project
-연구과제명: 다공성 전극과 고전도성 전해질을 이용한 초소형 전기화학 가스센서 및 계측전송 기술개발- Research title: Development of ultrathin electrochemical gas sensor and measurement transmission technology using porous electrode and high conductivity electrolyte
-기여율: 1/1- Contribution rate: 1/1
-주관기관: (주)신우전자- Organizer: Shinwoo Electronics Co., Ltd.
-연구기간: 2016.09.01 ~ 2017.08.31- Research period: 2016.09.01 ~ 2017.08.31
상기 목적을 달성하기 위한 본 발명에 의한 높이가 낮은 평판형 외형의 전기화학식 가스 센서는, 내부에 빈 수용공간을 포함하고, 검지 대상 가스가 상기 수용공간에 유입될 수 있도록 구성된 케이스; 상기 수용공간에 위치하는 전해질; 상기 수용공간에 설치되고, 상기 전해질에 접촉하여 전해를 수행하는 동시에 검지 대상 가스가 전해질에 용해된 농도에 따라 발생하는 전류의 변화를 검출할 수 있는, 작용전극과 상대전극 및 기준전극을 포함하는 유연성 재질의 전극부; 및 상기 전극부의 전극 각각을 외부와 전기적으로 연결하는 3개의 금속전극을 포함하여 구성되고, 상기 금속전극은 케이스 내부에 위치하는 끝부분이 바닥과 평행한 2차원 평면 상에서 90° 꺾인 고정부를 포함하는 것을 특징으로 한다.According to an aspect of the present invention, there is provided an electrochemical gas sensor having a flat plate-like external shape and having a low height and including a hollow accommodation space therein, the case being configured to allow a detection target gas to flow into the accommodation space; An electrolyte disposed in the accommodation space; A counter electrode and a reference electrode provided in the accommodation space and capable of detecting a change in current generated in contact with the electrolyte to perform electrolysis and a concentration of the detection target gas dissolved in the electrolyte, An electrode part made of a flexible material; And three metal electrodes electrically connecting each of the electrodes of the electrode unit to the outside, wherein the metal electrode includes a fixing unit having an end located inside the case and bent at 90 degrees on a two-dimensional plane parallel to the bottom .
본 발명은 전기화학식 가스 센서에서 작용전극과 상대전극 및 기준전극을 전기적으로 연결하기 위한 금속전극의 구조에 특징이 있으며, 구체적으로 케이스 내부에서 금속전극을 고정하기 위한 고정부가 바닥과 평행한 2차원 평면 상에서 좌측 또는 우측으로 90° 꺾인 구조를 적용하였다. 이러한 구조에 의해서 케이스와 금속전극의 조립이 용이하면서도 기계적으로 안정적인 구조를 유지하고, 전극과의 접촉 면적이 넓어지는 동시에 전기화학식 가스 센서의 높이를 낮출 수 있어 초소형 전기화학식 가스 센서를 제조할 수 있는 장점이 있다.The present invention is characterized by a structure of a metal electrode for electrically connecting a working electrode to a counter electrode and a reference electrode in an electrochemical gas sensor. More specifically, the present invention provides a two-dimensional A 90 ° bent structure is applied to the left or right side of the plane. With this structure, it is possible to easily assemble the case and the metal electrode, to maintain a mechanically stable structure, to increase the contact area with the electrode, and to reduce the height of the electrochemical gas sensor, There are advantages.
이때, 케이스에는 고정부의 형상에 대응되는 지지구조가 형성되고, 고정부가 지지구조에 삽입되어 위치함으로써, 금속전극이 안정적으로 고정된다. 그리고 수용공간이 형성된 하부 케이스와 상기 수용공간을 덮는 상부 케이스로 케이스를 구성하고, 지지구조가 하부 케이스에 형성되어 금속전극이 하부 케이스에 설치되는 구조인 것이 바람직하다. 지지구조는 금속전극의 윗면이 노출되어 전극부의 전극과 접촉할 수 있는 높이와 형상을 가진 구조인 것이 바람직하다.At this time, a supporting structure corresponding to the shape of the fixing portion is formed in the case, and the metal electrode is stably fixed by being inserted and positioned in the supporting structure. The case is preferably formed of a lower case having a receiving space and an upper case covering the receiving space, and the supporting structure is formed in the lower case and the metal electrode is installed in the lower case. It is preferable that the supporting structure has a structure having a height and shape such that the upper surface of the metal electrode can be exposed to the electrode of the electrode part.
한편, 금속전극은 케이스의 외부에 노출된 끝부분, 즉 고정부의 반대쪽이 아래쪽을 향하도록 중간이 90°로 꺾인 구조인 것이 바람직하다. 금속전극의 끝부분이 아래쪽을 향하도록 구성하여, 외부의 단자에 직접 연결되도록 함으로써, 전기화학식 가스 센서가 수평을 유지한 상태에서 바로 설치될 수 있는 장점이 있다.Meanwhile, it is preferable that the metal electrode has a structure in which the middle portion thereof is bent at an angle of 90 deg. So that the end portion exposed to the outside of the case, that is, the side opposite to the fixed portion faces downward. The end of the metal electrode is directed downward and is directly connected to an external terminal, so that the electrochemical gas sensor can be installed in a state in which it is kept horizontal.
그리고 금속전극이 케이스와 접하는 표면에 널링 처리를 수행하여 금속전극이 더욱 안정적으로 고정되도록 구성하는 것이 바람직하다.It is preferable that the surface of the metal electrode contacting the case is subjected to a knurling treatment so that the metal electrode is more stably fixed.
금속전극의 재질은 전기 연결이 가능한 재질이면 제한되지 않지만, 탄탈(Ta), 티타늄(Ti) 및 니켈(Ni) 중에 하나를 포함하는 재질인 것이 좋다.The material of the metal electrode is not limited as long as it is an electrically connectable material, but it is preferably made of a material containing one of tantalum (Ta), titanium (Ti) and nickel (Ni).
상술한 바와 같이 구성된 본 발명은, 케이스 내부에서 금속전극을 고정하기 위한 고정부를 바닥과 평행한 2차원 평면상에서 좌측 또는 우측으로 90° 꺾인 구조로 구성함으로써, 종래에 위쪽으로 2회 꺾어서 결합한 구조에 비하여 케이스의 제조 및 조립이 용이해지는 효과가 있다.The present invention constructed as described above has a structure in which the fixing portion for fixing the metal electrode in the case is formed by being bent at 90 degrees to the left or right on a two-dimensional plane parallel to the floor, It is possible to manufacture and assemble the case easily.
그리고 케이스 내부에 금속전극의 고정부에 대응되는 지지구조를 형성하여, 안정적으로 고정된 상태를 유지할 수 있는 효과가 있다.In addition, a support structure corresponding to the fixed portion of the metal electrode is formed in the case, thereby stably maintaining the fixed state.
또한, 2차원 평면상에서 휘어진 구조를 통해서, 전극부의 전극과 접촉할 수 있는 면적이 늘어나고, 전기화학식 가스 센서의 높이를 낮춰 평판형 외형의 초소형 전기화학식 가스 센서를 제조할 수 있는 효과가 있다.In addition, the area of contact with the electrode of the electrode portion is increased through the structure bent on the two-dimensional plane, and the height of the electrochemical gas sensor is reduced, thereby producing a micro electrochemical gas sensor of a flat plate-like outer shape.
나아가 본 발명의 구조를 적용한 전기화학식 가스 센서는 사용전력이 감소하고, 사용 수명도 증가하는 효과가 있다.Further, the electrochemical gas sensor to which the structure of the present invention is applied has the effect of reducing the electric power used and increasing the service life.
도 1은 본 발명의 일 실시예에 따른 전기화학식 가스 센서의 금속전극 구조를 나타내는 분해 사시도이다.1 is an exploded perspective view illustrating a structure of a metal electrode of an electrochemical gas sensor according to an embodiment of the present invention.
도 2는 본 발명의 실시예에 따른 전기화학식 가스 센서의 구조를 나타내기 위한 단면도이다.2 is a cross-sectional view illustrating a structure of an electrochemical gas sensor according to an embodiment of the present invention.
도 3은 본 발명의 실시예에 따른 전기화학식 가스 센서에 사용된 전극부의 구조를 나타내기 위한 분해 사시도이다.3 is an exploded perspective view illustrating an electrode unit used in an electrochemical gas sensor according to an embodiment of the present invention.
[부호의 설명][Description of Symbols]
100: 케이스 100: Case
110, 120, 130: 지지구조110, 120, 130: support structure
150: 격리벽150: isolation wall
210, 220, 230: 금속전극 210, 220, 230: metal electrode
212: 몸체212: Body
214: 고정부 214:
215: 외부연결부215: External connection
216: 널링부216: null ring
300: 수용공간300: accommodation space
400: 전해질400: electrolyte
500: 전극부500:
514: 작용전극514: working electrode
524: 상대전극524: counter electrode
526: 기준전극526: reference electrode
첨부된 도면을 참조하여 본 발명에 따른 실시예를 상세히 설명한다. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, embodiments of the present invention will be described in detail.
본 발명의 전기화학식 가스 센서는 케이스와 케이스 내부의 수용공간에 위치하는 전해질 및 수용공간에 설치된 전극부를 포함하여 구성된다.The electrochemical gas sensor of the present invention comprises a case, an electrolyte disposed in the accommodation space inside the case, and an electrode unit provided in the accommodation space.
케이스는 전기화학식 가스 센서를 구성하는 몸체이며, 내부에 수용공간이 형성되고, 수용공간으로 검지 대상 가스가 포함된 공기 유입될 수 있도록 통기구가 형성된다. 외부의 습기나 먼지 등의 유입을 차단하기 위해서 통기구에는 필터가 설치되고, 가스 유입을 위한 통기구와 필터에 대한 구성은 본 발명의 특징을 해치지 않는 범위에서 일반적인 가스 센서의 기술이 제한 없이 적용될 수 있으므로, 구체적인 설명은 생략한다.The case is a body constituting the electrochemical gas sensor. A housing space is formed in the housing, and a ventilation hole is formed so that air containing the gas to be detected can be introduced into the housing space. A filter is provided in the ventilation hole to block the inflow of moisture or dust from the outside, and the configuration of the ventilation hole for the inflow of gas and the filter can be applied without limitation to the general gas sensor technology without impairing the characteristics of the present invention , And a detailed description thereof will be omitted.
전해질은 작용전극과 기준전극 사이에 인가된 전류에 의해서 전해되는 한편, 케이스의 통기구를 통해 유입된 검지 대상 가스가 용해되어 작용전극과 상대전극 사이의 전류에 변화가 발생하는 점에서 일반적인 전기화학식 가스 센서의 전해질과 동일한 기능을 하므로 구체적인 설명은 생략한다.The electrolyte is electrolyzed by the current applied between the working electrode and the reference electrode while the detection target gas introduced through the vent of the case dissolves and the current between the working electrode and the counter electrode changes, Since it has the same function as the electrolyte of the sensor, its detailed description is omitted.
전극부는 수용공간에 설치되어, 작용전극, 작용전극과 전해질에 대한 전해를 수행하는 기준전극 및 작용전극과 사이에 발생하는 전해 전류 측정을 위한 상대전극을 포함하며, 본 발명의 특징을 해치지 않는 범위에서 일반적인 전기화학식 가스 센서의 전극부의 내용이 모두 적용될 수 있으므로 구체적인 설명은 생략한다.The electrode unit includes a working electrode, a reference electrode for electrolyzing the working electrode and the electrolyte, and a counter electrode for measuring an electrolytic current generated between the working electrode and the working electrode. The electrode unit of the conventional electrochemical gas sensor can be applied to all of them, and thus a detailed description thereof will be omitted.
금속전극은 전극부에 포함된 전극들을 외부와 전기적으로 연결하기 위한 구성으로서, 일단은 케이스 내부에서 전극부의 전극들에 각각 접촉하고, 타단은 케이스 외부로 노출되어 외부 회로 등에 전기적으로 연결하기 위한 단자와 결합한다. 금속전극의 재질은 탄탈(Ta)과 티타늄(Ti) 및 니켈(Ni) 등과 같이 종래의 전기화학식 가스 센서에 사용되던 재질을 제한 없이 적용할 수 있다.The metal electrode has a structure for electrically connecting the electrodes included in the electrode portion to the outside. The metal electrode is in contact with the electrodes of the electrode portion inside the case at one end and exposed to the outside of the case at the other end, Lt; / RTI > The material of the metal electrode may be any material used in conventional electrochemical gas sensors such as tantalum (Ta), titanium (Ti), and nickel (Ni).
본 발명은 이상에서 설명한 전기화학식 가스 센서의 일반적인 구성을 포함하면서, 금속전극의 구체적인 구조에서 종래의 기술과 차이가 있다.The present invention includes the general construction of the electrochemical gas sensor described above, but differs from the conventional technology in the specific structure of the metal electrode.
이하에서는 본 발명의 특징적인 부분인 금속전극의 구체적인 구조에 대하여 설명한다.Hereinafter, the specific structure of the metal electrode, which is a characteristic part of the present invention, will be described.
도 1은 본 발명의 실시예에 따른 전기화학식 가스 센서의 금속전극 구조를 나타내는 분해 사시도이고, 도 2는 본 발명의 실시예에 따른 전기화학식 가스 센서의 구조를 나타내기 위한 단면도이며,도 3은 본 발명의 실시예에 따른 전기화학식 가스 센서에 사용된 전극부의 구조를 나타내기 위한 분해 사시도이다.FIG. 1 is an exploded perspective view showing a structure of a metal electrode of an electrochemical gas sensor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view illustrating the structure of an electrochemical gas sensor according to an embodiment of the present invention, FIG. 3 is an exploded perspective view showing the structure of an electrode part used in an electrochemical gas sensor according to an embodiment of the present invention. FIG.
도 1에 도시된 것과 같이, 본 실시예의 전기화학식 가스 센서는 케이스(100)에 3개의 금속전극(210, 220, 230)이 설치된다. As shown in FIG. 1, in the electrochemical gas sensor of this embodiment, three metal electrodes 210, 220 and 230 are installed in a case 100.
도 2에 도시된 것과 같이, 케이스(100)에는 수용공간(300)이 형성되고 수용공간(300)에는 전해질(400)이 위치한다. 케이스(100)는 상부 케이스와 하부 케이스로 나누어 구성될 수 있으며, 본 실시예는 하부 케이스에 금속전극이 설치된 경우를 도시하였으나, 이에 한정되는 것은 아니다.As shown in FIG. 2, a housing space 300 is formed in the case 100, and an electrolyte 400 is disposed in the housing space 300. The case 100 may be divided into an upper case and a lower case. In this embodiment, metal electrodes are provided in the lower case, but the present invention is not limited thereto.
하부 케이스에 설치된 3개의 금속전극(210, 220, 230) 각각은 전극부(500)에 포함된 작용전극(514)과 상대전극(524) 및 기준전극(526) 중에 하나와 접촉한다. 구체적으로 전극부(500)는 금속전극(210, 220, 230)의 윗부분에 위치하여, 전극부(500)에 형성된 3개의 전극이 각각 금속전극(210, 220, 230)의 윗면에 접촉하도록 설치된다.첨부된 도면을 참조하여 본 발명에 따른 실시예를 상세히 설명한다. Each of the three metal electrodes 210, 220 and 230 provided on the lower case is in contact with one of the working electrode 514, the counter electrode 524 and the reference electrode 526 included in the electrode unit 500. Specifically, the electrode unit 500 is located on the upper side of the metal electrodes 210, 220 and 230 so that the three electrodes formed on the electrode unit 500 contact the upper surfaces of the metal electrodes 210, 220 and 230, respectively. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the accompanying drawings, embodiments of the present invention will be described in detail.
본 발명의 전기화학식 가스 센서는 케이스와 케이스 내부의 수용공간에 위치하는 전해질 및 수용공간에 설치된 전극부를 포함하여 구성된다.The electrochemical gas sensor of the present invention comprises a case, an electrolyte disposed in the accommodation space inside the case, and an electrode unit provided in the accommodation space.
케이스는 전기화학식 가스 센서를 구성하는 몸체이며, 내부에 수용공간이 형성되고, 수용공간으로 검지 대상 가스가 포함된 공기 유입될 수 있도록 통기구가 형성된다. 외부의 습기나 먼지 등의 유입을 차단하기 위해서 통기구에는 필터가 설치되고, 가스 유입을 위한 통기구와 필터에 대한 구성은 본 발명의 특징을 해치지 않는 범위에서 일반적인 가스 센서의 기술이 제한 없이 적용될 수 있으므로, 구체적인 설명은 생략한다.The case is a body constituting the electrochemical gas sensor. A housing space is formed in the housing, and a ventilation hole is formed so that air containing the gas to be detected can be introduced into the housing space. A filter is provided in the ventilation hole to block the inflow of moisture or dust from the outside, and the configuration of the ventilation hole for the inflow of gas and the filter can be applied without limitation to the general gas sensor technology without impairing the characteristics of the present invention , And a detailed description thereof will be omitted.
전해질은 작용전극과 기준전극 사이에 인가된 전류에 의해서 전해되는 한편, 케이스의 통기구를 통해 유입된 검지 대상 가스가 용해되어 작용전극과 상대전극 사이의 전류에 변화가 발생하는 점에서 일반적인 전기화학식 가스 센서의 전해질과 동일한 기능을 하므로 구체적인 설명은 생략한다.The electrolyte is electrolyzed by the current applied between the working electrode and the reference electrode while the detection target gas introduced through the vent of the case dissolves and the current between the working electrode and the counter electrode changes, Since it has the same function as the electrolyte of the sensor, its detailed description is omitted.
전극부는 수용공간에 설치되어, 작용전극, 작용전극과 전해질에 대한 전해를 수행하는 기준전극 및 작용전극과 사이에 발생하는 전해 전류 측정을 위한 상대전극을 포함하며, 본 발명의 특징을 해치지 않는 범위에서 일반적인 전기화학식 가스 센서의 전극부의 내용이 모두 적용될 수 있으므로 구체적인 설명은 생략한다.The electrode unit includes a working electrode, a reference electrode for electrolyzing the working electrode and the electrolyte, and a counter electrode for measuring an electrolytic current generated between the working electrode and the working electrode. The electrode unit of the conventional electrochemical gas sensor can be applied to all of them, and thus a detailed description thereof will be omitted.
금속전극은 전극부에 포함된 전극들을 외부와 전기적으로 연결하기 위한 구성으로서, 일단은 케이스 내부에서 전극부의 전극들에 각각 접촉하고, 타단은 케이스 외부로 노출되어 외부 회로 등에 전기적으로 연결하기 위한 단자와 결합한다. 금속전극의 재질은 탄탈(Ta)과 티타늄(Ti) 및 니켈(Ni) 등과 같이 종래의 전기화학식 가스 센서에 사용되던 재질을 제한 없이 적용할 수 있다.The metal electrode has a structure for electrically connecting the electrodes included in the electrode portion to the outside. The metal electrode is in contact with the electrodes of the electrode portion inside the case at one end and exposed to the outside of the case at the other end, Lt; / RTI > The material of the metal electrode may be any material used in conventional electrochemical gas sensors such as tantalum (Ta), titanium (Ti), and nickel (Ni).
본 발명은 이상에서 설명한 전기화학식 가스 센서의 일반적인 구성을 포함하면서, 금속전극의 구체적인 구조에서 종래의 기술과 차이가 있다.The present invention includes the general construction of the electrochemical gas sensor described above, but differs from the conventional technology in the specific structure of the metal electrode.
이하에서는 본 발명의 특징적인 부분인 금속전극의 구체적인 구조에 대하여 설명한다.Hereinafter, the specific structure of the metal electrode, which is a characteristic part of the present invention, will be described.
도 1은 본 발명의 실시예에 따른 전기화학식 가스 센서의 금속전극 구조를 나타내는 분해 사시도이고, 도 2는 본 발명의 실시예에 따른 전기화학식 가스 센서의 구조를 나타내기 위한 단면도이며,도 3은 본 발명의 실시예에 따른 전기화학식 가스 센서에 사용된 전극부의 구조를 나타내기 위한 분해 사시도이다.FIG. 1 is an exploded perspective view showing a structure of a metal electrode of an electrochemical gas sensor according to an embodiment of the present invention, FIG. 2 is a cross-sectional view illustrating the structure of an electrochemical gas sensor according to an embodiment of the present invention, FIG. 3 is an exploded perspective view showing the structure of an electrode part used in an electrochemical gas sensor according to an embodiment of the present invention. FIG.
도 1에 도시된 것과 같이, 본 실시예의 전기화학식 가스 센서는 케이스(100)에 3개의 금속전극(210, 220, 230)이 설치된다. As shown in FIG. 1, in the electrochemical gas sensor of this embodiment, three metal electrodes 210, 220 and 230 are installed in a case 100.
도 2에 도시된 것과 같이, 케이스(100)에는 수용공간(300)이 형성되고 수용공간(300)에는 전해질(400)이 위치한다. 케이스(100)는 상부 케이스와 하부 케이스로 나누어 구성될 수 있으며, 본 실시예는 하부 케이스에 금속전극이 설치된 경우를 도시하였으나, 이에 한정되는 것은 아니다.As shown in FIG. 2, a housing space 300 is formed in the case 100, and an electrolyte 400 is disposed in the housing space 300. The case 100 may be divided into an upper case and a lower case. In this embodiment, metal electrodes are provided in the lower case, but the present invention is not limited thereto.
하부 케이스에 설치된 3개의 금속전극(210, 220, 230) 각각은 전극부(500)에 포함된 작용전극(514)과 상대전극(524) 및 기준전극(526) 중에 하나와 접촉한다. 구체적으로 전극부(500)는 금속전극(210, 220, 230)의 윗부분에 위치하여, 전극부(500)에 형성된 3개의 전극이 각각 금속전극(210, 220, 230)의 윗면에 접촉하도록 설치된다.Each of the three metal electrodes 210, 220 and 230 provided on the lower case is in contact with one of the working electrode 514, the counter electrode 524 and the reference electrode 526 included in the electrode unit 500. Specifically, the electrode unit 500 is located on the upper side of the metal electrodes 210, 220 and 230 so that the three electrodes formed on the electrode unit 500 contact the upper surfaces of the metal electrodes 210, 220 and 230, respectively. do.
작용전극(514)과 상대전극(524) 및 기준전극(526)에 각각 접하는 3개의 금속전극(210, 220, 230)은 구성이 동일하므로, 구체적인 구조에 대하여 대표적으로 하나의 금속전극(210)에 대해서 설명한다.The three metal electrodes 210, 220 and 230 which are in contact with the working electrode 514 and the counter electrode 524 and the reference electrode 526 are the same in structure. Will be described.
본 실시예의 금속전극(210)은 몸체(212)와 양쪽 끝부분인 고정부(214) 및 외부연결부(215)를 포함하여 구성된다.The metal electrode 210 of the present embodiment includes a body 212, a fixing portion 214 at both ends, and an external connection portion 215.
몸체(212)는 케이스(100)의 외부와 내부를 걸쳐서 위치하는 직선 구조이다.The body 212 has a straight line structure that is located between the outside and the inside of the case 100.
고정부(214)는 케이스(100) 내부에서 몸체(212)의 끝과 이어진 부분으로, 2차원 평면상에서 좌측 또는 우측으로 꺾인 구조이다. 케이스(100)의 내부에는 고정부(214)의 꺾인 형상에 대응되는 형상으로 지지구조(110)가 형성되며, 고정부(214)는 지지구조(110)에 삽입되어 위치함으로써 금속전극(210)이 케이스(100)의 외부로 빠지는 것을 방지하여 기계적 지지강도를 견고하게 유지하며, 나아가 케이스(100) 내부에서 금속전극(210)이 움직이는 것을 방지한다. The fixing part 214 is a part connected to the end of the body 212 inside the case 100 and has a structure bent to the left or right on a two-dimensional plane. A supporting structure 110 is formed in the case 100 in a shape corresponding to the bent shape of the fixing portion 214. The fixing portion 214 is inserted into the supporting structure 110 to be positioned on the metal electrode 210, The metal electrode 210 can be prevented from moving inside the case 100. [0050] In addition,
이때, 고정부(214) 및 고정부(214)에 연결된 몸체(212)는 전극부에 형성된 전극과 접촉하여야 하므로, 지지구조(110)에 완전히 덥히지 않고 노출되어야 하며, 지지구조(110)의 높이도 전극이 접촉할 수 있는 높이로 형성되어야 한다.At this time, the body 212 connected to the fixing portion 214 and the fixing portion 214 must be exposed to the supporting structure 110 without being completely covered with the electrode, The height should also be such that the electrode can contact.
또한, 지지구조의 뒷부분을 전해질과의 격리를 위한 벽체인 격리벽(150)으로 구성하여, 전해질이 위치하는 수용공간을 형성함으로써, 수용공간의 전해질이 금속전극이 설치된 공간으로 넘어오지 못하도록 구성할 수 있다. 격리벽을 지지구조와 별도로 형성하는 경우에 비하여 공간의 낭비가 줄어들며, 초소형 전기화학식 가스 센서를 제조할 때에 수용공간의 넓이를 확보할 수 있는 효과가 있다.In addition, the support structure may be formed of an isolation wall 150, which is a wall for isolating the electrolyte from the back of the support structure, so that the electrolyte in the accommodation space is prevented from passing over the space where the metal electrode is installed . The waste of space is reduced as compared with the case where the isolation wall is formed separately from the supporting structure and the space for accommodating space can be secured when fabricating the micro electro chemical gas sensor.
한편, 본 실시예의 금속전극(210)은 케이스 측의 끝부분이 수평으로 휘어진 고정부(214)를 포함하는 구조이기 때문에, 금속전극의 끝부분이 단순한 직선형으로 구성된 경우에 비하여, 전극부(500)의 기준전극(526)과 접촉할 수 있는 면적이 상대적으로 더 넓어지는 효과가 있다. 또한, 전극부(500)의 기준전극(526)에서 금속전극(210)과 접촉시키기 위하여 형성된 부분의 위치가 조금 어긋나는 경우에도 접촉상태를 유지할 수 있는 장점이 있다. 이러한 접촉면적의 증가로 인하여 고장이 줄고 센서의 수명이 증가하는 효과가 있다.Since the metal electrode 210 of the present embodiment has the structure including the fixing portion 214 in which the end portion of the case side is bent horizontally, the electrode portion 500 The area of contact with the reference electrode 526 of the electrode assembly 526 is relatively larger. Further, even when the position of the portion formed for making contact with the metal electrode 210 at the reference electrode 526 of the electrode unit 500 is slightly deviated, the contact state can be maintained. This increase in contact area reduces the number of failures and increases the lifetime of the sensor.
나아가 종래에 케이스 내부에서 위쪽으로 2회 꺾어진 형태로 금속전극을 구성한 경우와 달리, 케이스(100)와 금속전극(210)을 별도로 제작한 뒤에 조립과정에서 케이스(100)에 금속전극(210)을 설치할 수 있다. 이는 케이스 제작과정에서 금속전극을 위치시킨 상태로 사출성형하는 것에 비하여 제조 공정이 매우 간편해지는 효과가 있다. 그리고 케이스 내부에서 위쪽으로 2회 꺾어진 경우에 비하여, 금속 전극의 위쪽 공간을 추가로 사용하지 않기 때문에, 낮은 높이의 전기화학식 가스 센서를 제조할 수 있으며, 최종적으로 초소형 전기화학식 가스 센서를 제조하여 제공할 수 있는 장점이 있다.The case 100 and the metal electrode 210 are separately manufactured and then the metal electrode 210 is attached to the case 100 in the assembling process, unlike the case where the metal electrode is formed by bending the case upward twice inside the case Can be installed. This is advantageous in that the manufacturing process is much simpler than the injection molding in which the metal electrode is positioned in the case manufacturing process. In addition, since the upper space of the metal electrode is not used in addition to the case where the electrode is bent upward twice inside the case, a low-height electrolytic chemical gas sensor can be manufactured, and finally, There is an advantage to be able to do.
외부연결부(215)는 케이스(100) 외부에서 몸체(212)의 끝과 이어진 부분이며, 아래쪽으로 90°꺾어져 있는 부분이다. 전기화학식 가스 센서는 수평을 유지한 상태에서 외부의 타 회로 등에 설치되기 때문에, 전기 연결을 위한 단자가 바닥에 형성된 경우가 대부분이며, 종래에는 별도의 연결재를 바닥에 형성된 단자와 금속전극을 연결하였다. 하지만 본 실시예의 금속전극(210)은 케이스(100) 외부에 노출된 끝부분을 아래쪽으로 90°꺾어서 외부연결부(215)를 형성하였기 때문에, 그 자체로 바닥에 형성된 단자에 끼워서 연결할 수 있는 장점이 있다.The external connection portion 215 is a portion that extends from the outside of the case 100 to the end of the body 212 and is bent downward by 90 degrees. Since the electrochemical gas sensor is installed in an external circuit or the like in a state in which the electrochemical gas sensor is maintained in a horizontal position, terminals for electrical connection are mostly formed on the bottom. Conventionally, . However, since the metal electrode 210 of the present embodiment is formed by forming the external connection portion 215 by bending the end portion exposed to the outside of the case 100 downward by 90 degrees, the metal electrode 210 can be connected to the terminal formed on the bottom by itself have.
외부연결부(215)는 케이스(100)의 외부에서 아래쪽으로 꺾어져 있기 때문에, 케이스(100)에 금속전극(210)을 설치하는 과정에서 문제가 없다.Since the external connection part 215 is bent downward from the outside of the case 100, there is no problem in the process of installing the metal electrode 210 in the case 100. [
한편, 본 실시예의 금속전극(210)은 케이스(100)의 외부와 내부에 걸쳐서 위치하는 몸체(212)가 케이스(100)와 접하는 부분의 표면에 널링(knurling) 처리를 수행하여 널링부(216)를 형성한다. The metal electrode 210 of the present embodiment performs a knurling process on a surface of a portion of the body 212 located outside and inside the case 100 in contact with the case 100 to form a nulling portion 216 ).
널링부(216)는 센서를 최종적으로 조립한 경우에, 상부 케이스와 하부 케이스에 맞물려서 금속전극(210)이 움직이는 것을 방지한다. 이때, 널링부(216)가 케이스(100)와 접촉하는 부분에만 형성하여, 조립한 이후에 외부에서는 보이지 않도록 형성한다.The nulling portion 216 is engaged with the upper case and the lower case to prevent the metal electrode 210 from moving when the sensor is finally assembled. At this time, the knurling portion 216 is formed only at a portion where the knurling portion 216 makes contact with the case 100, and is formed so as not to be seen from outside after assembling.
이상 본 발명을 바람직한 실시예를 통하여 설명하였는데, 상술한 실시예는 본 발명의 기술적 사상을 예시적으로 설명한 것에 불과하며, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 다양한 변화가 가능함은 이 분야에서 통상의 지식을 가진 자라면 이해할 수 있을 것이다. 따라서 본 발명의 보호범위는 특정 실시예가 아니라 특허청구범위에 기재된 사항에 의해 해석되어야 하며, 그와 동등한 범위 내에 있는 모든 기술적 사상도 본 발명의 권리범위에 포함되는 것으로 해석되어야 할 것이다.While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Those skilled in the art will understand. Therefore, the scope of protection of the present invention should be construed not only in the specific embodiments but also in the scope of claims, and all technical ideas within the scope of the same shall be construed as being included in the scope of the present invention.

Claims (8)

  1. 내부에 빈 수용공간을 포함하고, 검지 대상 가스가 상기 수용공간에 유입될 수 있도록 구성된 케이스;A case including an empty accommodation space inside and configured to allow detection target gas to flow into the accommodation space;
    상기 수용공간에 위치하는 전해질;An electrolyte disposed in the accommodation space;
    상기 수용공간에 설치되고, 상기 전해질에 접촉하여 전해를 수행하는 동시에 검지 대상 가스가 전해질에 용해된 농도에 따라 발생하는 전류의 변화를 검출할 수 있는, 작용전극과 상대전극 및 기준전극을 포함하는 유연성 재질의 전극부; 및A counter electrode and a reference electrode provided in the accommodation space and capable of detecting a change in current generated in contact with the electrolyte to perform electrolysis and a concentration of the detection target gas dissolved in the electrolyte, An electrode part made of a flexible material; And
    상기 전극부의 전극 각각을 외부와 전기적으로 연결하는 3개의 금속전극을 포함하여 구성되고,And three metal electrodes electrically connecting the electrodes of the electrode unit to the outside,
    상기 금속전극은 케이스 내부에 위치하는 끝부분이 바닥과 평행한 2차원 평면상에서 90° 꺾인 고정부를 포함하는 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서.Wherein the metal electrode includes a fixed portion having an end located inside the case bent at 90 degrees on a two-dimensional plane parallel to the bottom.
  2. 청구항 1에 있어서,The method according to claim 1,
    상기 케이스에는 상기 고정부의 형상에 대응되는 지지구조가 형성되며,A support structure corresponding to the shape of the fixing portion is formed in the case,
    상기 고정부가 상기 지지구조에 삽입되어 위치하는 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서. Wherein the fixing portion is inserted and positioned in the supporting structure.
  3. 청구항 2에 있어서,The method of claim 2,
    상기 케이스는, 수용공간이 형성된 하부 케이스와 상기 수용공간을 덮는 상부 케이스로 구성되고,The case includes a lower case having a receiving space and an upper case covering the receiving space,
    상기 지지구조가 상기 하부 케이스에 형성된 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서. Wherein the support structure is formed in the lower case.
  4. 청구항 3에 있어서,The method of claim 3,
    상기 지지구조는 상기 금속전극의 윗면이 노출되어 상기 전극부의 전극과 접촉할 수 있는 구조인 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서.Wherein the support structure has a structure in which an upper surface of the metal electrode is exposed to be in contact with an electrode of the electrode unit.
  5. 청구항 1에 있어서,The method according to claim 1,
    상기 금속전극은 케이스의 외부에 노출된 끝부분이 아래쪽을 향하도록 중간이 90°로 꺾인 구조인 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서. Wherein the metal electrode has a structure in which an intermediate portion of the metal electrode is bent at an angle of 90 DEG with an end portion exposed to the outside of the case facing downward.
  6. 청구항 1에 있어서,The method according to claim 1,
    상기 금속전극이 상기 케이스와 접하는 표면에 널링 처리된 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서. Wherein the metal electrode is knurled on a surface in contact with the case.
  7. 청구항 1에 있어서,The method according to claim 1,
    상기 금속전극이 탄탈(Ta), 티타늄(Ti) 및 니켈(Ni) 중에 하나를 포함하는 재질인 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서.Wherein the metal electrode is made of one of tantalum (Ta), titanium (Ti), and nickel (Ni).
  8. 청구항 1에 있어서,The method according to claim 1,
    상기 케이스에는 상기 고정부와 접하는 격리벽이 형성된 것을 특징으로 하는 평판형 외형의 전기화학식 가스 센서. Wherein the case is provided with an isolating wall in contact with the fixing portion.
PCT/KR2018/008276 2017-07-28 2018-07-23 Electrochemical gas sensor having planar exterior WO2019022454A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020170096063A KR101944278B1 (en) 2017-07-28 2017-07-28 Electrochemical gas sensor with flat plate type case
KR10-2017-0096063 2017-07-28

Publications (1)

Publication Number Publication Date
WO2019022454A1 true WO2019022454A1 (en) 2019-01-31

Family

ID=65041258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2018/008276 WO2019022454A1 (en) 2017-07-28 2018-07-23 Electrochemical gas sensor having planar exterior

Country Status (2)

Country Link
KR (1) KR101944278B1 (en)
WO (1) WO2019022454A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102249483B1 (en) * 2019-03-28 2021-05-11 주식회사 신우전자 Apparatus detecting a toxic gas

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002071621A (en) * 2000-08-25 2002-03-12 New Cosmos Electric Corp Constant potential electrolytic gas sensor
JP2004117307A (en) * 2002-09-27 2004-04-15 Nemoto & Co Ltd Electrochemical sensor
KR20080050951A (en) * 2006-12-04 2008-06-10 한국전자통신연구원 Electrochemical gas sensor chip and method for preparing the same
JP2016530544A (en) * 2013-09-12 2016-09-29 コリア・アドバンスト・インスティテュート・オブ・サイエンス・アンド・テクノロジー Hydrogen sensor element for measuring dissolved hydrogen gas concentration in liquid and method for measuring hydrogen gas concentration using the same

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3387274B2 (en) * 1995-07-10 2003-03-17 松下電器産業株式会社 Humidity and gas detecting element and method of manufacturing the same
JP2002174608A (en) * 2000-12-06 2002-06-21 Figaro Eng Inc Gas sensor and its manufacturing method
JP6056376B2 (en) * 2012-10-29 2017-01-11 住友電気工業株式会社 WIRELESS COMMUNICATION SYSTEM, ROAD COMMUNICATION DEVICE, COMMUNICATION CONTROL DEVICE, COMPUTER PROGRAM, AND COMMUNICATION METHOD USED FOR THE SAME

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002071621A (en) * 2000-08-25 2002-03-12 New Cosmos Electric Corp Constant potential electrolytic gas sensor
JP2004117307A (en) * 2002-09-27 2004-04-15 Nemoto & Co Ltd Electrochemical sensor
KR20080050951A (en) * 2006-12-04 2008-06-10 한국전자통신연구원 Electrochemical gas sensor chip and method for preparing the same
JP2016530544A (en) * 2013-09-12 2016-09-29 コリア・アドバンスト・インスティテュート・オブ・サイエンス・アンド・テクノロジー Hydrogen sensor element for measuring dissolved hydrogen gas concentration in liquid and method for measuring hydrogen gas concentration using the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ARCHIVE SCREEN CAPTURE, 23 February 2017 (2017-02-23), Retrieved from the Internet <URL:https://web.archive.org/web/20170223003555/https://www.nemoto.co.jp/nse/sensor-search/electrochem> *

Also Published As

Publication number Publication date
KR101944278B1 (en) 2019-01-31

Similar Documents

Publication Publication Date Title
WO2015080332A1 (en) Shunt resistor and shunt resistor assembly
WO2010128791A2 (en) Voltage balancing device for battery cell
CN102636542B (en) Gas sensor
WO2013062256A1 (en) Top cap assembly having a novel structure
WO2013022210A2 (en) Secondary battery pack
WO2010120072A2 (en) Apparatus for collecting suspended particle
WO2019022454A1 (en) Electrochemical gas sensor having planar exterior
EP0974834A3 (en) Gas sensor with solid and liquid electrolytes connected in series between first and second electrodes
WO2020091280A1 (en) Electrical connection device and electronic device comprising same
CN109997034A (en) Method and apparatus for the electrolyte concentration measurement in electrochemical sensor
WO2022039434A1 (en) Wire rope diagnostic device that can be engaged using battery packs
WO2013100264A1 (en) Biosensor and method for manufacturing same
WO2018016755A1 (en) Battery pack
CN208187963U (en) One kind is used for and the matching used hydrogen detection components of optoacoustic spectroscopy instrument
WO2019045232A1 (en) Glucose sensor and method for manufacturing same
WO2019022353A1 (en) Electrochemical gas sensor having flexible curved electrode
WO2018216847A1 (en) Cell for measuring ion conductivity of ion exchange membrane and method for measuring ion conductivity by using same
WO2019045335A1 (en) Battery module for supplying power for emergency call
WO2010038939A2 (en) Contact pad for sensing the voltage of a cell module assembly, and cell module assembly
WO2016072633A1 (en) Nitrogen oxide sensor
WO2017171206A1 (en) Gas detecting tag and method of manufacturing same
CN217133028U (en) Electrochemical gas sensor
CN112525968A (en) Alcohol sensor based on blowing method and intelligent equipment
WO2013073885A1 (en) Biosensor having identification information and apparatus for measuring same
WO2023085631A1 (en) Battery module with improved waterproof and dustproof performance and battery pack including same

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18837949

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18837949

Country of ref document: EP

Kind code of ref document: A1